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Keywords
Numerical models have become an essential part of snow avalanche engineering. Recent
advances in understanding the rheology of flowing snow and the mechanics of entrainment and
deposition have made numerical models more reliable. Coupled with field observations and historical
records, they are especially helpful in understanding avalanche flow in complex terrain. However, the
application of numerical models poses several new challenges to avalanche engineers. A detailed
understanding of the avalanche phenomena is required to specify initial conditions (release zone
dimensions and snowcover entrainment rates) as well as the friction parameters, which are no longer
based on empirical back-calculations, rather terrain roughness, vegetation and snow properties. In this
paper we discuss these problems by presenting the computer model RAMMS, which was specially
designed by the SLF as a practical tool for avalanche engineers. RAMMS solves the depth-averaged
equations governing avalanche flow with first and second-order numerical solution schemes. A
tremendous effort has been invested in the implementation of advanced input and output features.
Simulation results are therefore clearly and easily visualized to simplify their interpretation. More
importantly, RAMMS has been applied to a series of well-documented avalanches to gauge model
performance. In this paper we present the governing differential equations, highlight some of the input
and output features of RAMMS and then discuss the simulation of the Gatschiefer avalanche that
occurred in April 2008, near Klosters/Monbiel, Switzerland.
Investigation of TRPV1 loss-of-function phenotypes in transgenic shRNA expressing and knockout mice
(2008)
Tool supported requirements analysis for the user centered development of mobile enterprise software
(2008)
A user centered development method has proved satisfactory for the development of mobile enterprise software. To make use of this method, detailed information about the user and the place where the user interacts with his mobile device is required. This article describes how both can be modeled by a stereotypical and conceptual extended UML extension. Finally, a software tool is presented that supports the developed UML extension.
Modellfabrik im Zeichen der Automatisierungstechnik / Gall, Jan ; Enning, Manfred ; Abel, Dirk
(2008)
Parasitäre Strategien
(2008)
Entwicklung eines Bemessungsmodells für punktförmige Verbindungen textibewehrter Betonbauteile
(2008)
Logic-based robot control in highly dynamic domains / Ferrein, Alexander ; Lakemeyer, Gerhard
(2008)
Usability engineering
(2008)
Magnetic Resonance Imaging (MRI) of moving organs requires synchronization with physiological motion or flow, which dictate the viable window for data acquisition. To meet this challenge, this study proposes an acoustic gating device (ACG) that employs acquisition and processing of acoustic signals for synchronization while providing MRI compatibility, immunity to interferences with electro-magnetic and acoustic fields and suitability for MRI at high magnetic field strengths. The applicability and robustness of the acoustic gating approach is examined in a pilot study, where it substitutes conventional ECG-gating for cardiovascular MR. The merits and limitations of the ACG approach are discussed. Implications for MR imaging in the presence of physiological motion are considered including synchronization with other structure- or motion borne sounds.
On 1st January 1998, the German telecom market was fully liberalised. Since then genuine competition between market participants has developed, based on a comprehensive legal and regulatory framework that provides for safeguards against unfair competition and market power by Deutsche Telekom. Today, about 10 years after the liberalisation of the telecommunications sector a revision of this regulatory approach has become necessary because at least on three dimensions the situation is quite different from the one 10 years ago: First, with numerous established alternative operators in the market monopolies have been successfully challenged and competition introduced. Second, not only is Cable TV becoming in large parts of Germany a viable alternative for the provision of broadband services but also mobile services are becoming increasingly a substitute for fixed services. Last but not least there are important technological changes under way, requiring huge investments in infrastructure upgrades for next generation networks. In the light of these new developments the question is to which extent the current regulatory approach of severe ex-ante regulatory intervention is still appropriate. Is any part of the network of the former incumbent still a bottleneck? A more light handed regulatory approach might be the right response to this new situation. The paper is organised as follows: The first section will briefly examine the economic rationale for regulating network access. Based on the assumption that regulation is always necessary when bottlenecks exist regulatory principles for an efficient network access regime will be derived. The second section compares the situation of the German market in early 1998 with the one of today. Thereby three dimensions will be considered: the degree of competition, the potential for substitution and technological developments. The third section will define some requirements for the future regulation of telecom markets. Proposals will be elaborated how to ensure competitive telecom markets in the light of new economic and technological challenges.
- Wie kam es zu der globalen Finanzkrise? - Wodurch zeichnet sich die Finanzkrise aus? - Wer hat die Finanzkrise verschuldet? - Welche Rolle spielten Spekulanten? - Inwiefern ist die Finanzkrise selbstverschuldet? - Ist die Globalisierung Schuld an den Finanzkrisen in zahlreichen Regionen dieser Welt? - Wie wirkt sich die Finanzkrise auf die Realwirtschaft aus? - Welche Wege bieten sich, aus der Krise herauszukommen?
Haftung im Vereinsrecht
(2008)
Enterprise SOA Roadmap
(2008)
Taxiverkehr in Deutschland
(2008)
Abstract of the authors: In many areas of computer science ontologies become more and more important. The use of ontologies for domain modeling often brings up the issue of ontology integration. The task of merging several ontologies, covering specific subdomains, into one united ontology has to be solved. Many approaches for ontology integration aim at automating the process of ontology alignment. However, a complete automation is not feasible, and user interaction is always required. Nevertheless, most ontology integration tools offer only very limited support for the interactive part of the integration process. In this paper, we present a novel approach for the interactive integration of ontologies. The result of the ontology integration is incrementally updated after each definition of a correspondence between ontology elements. The user is guided through the ontologies to be integrated. By restricting the possible user actions, the integrity of all defined correspondences is ensured by the tool we developed. We evaluated our tool by integrating different regulations concerning building design.
Inhaltsverzeichnis Material / Anregungen zur einführenden Großveranstaltung (zu Abschnitt 3, Seite 4 des Leitfadens) • Linkliste Materialien und Anregungen zu ersten (Gruppen-)Treffen (zu Abschnitt 3. a., Seite 5 des Leitfadens) • Lebendige Statistik • Gruppenspiegel • Das Dreieck der Gemeinsamkeiten • Eine Rückmeldung sollte sein Material / Anregungen zu weiteren (Gruppen-)Treffen im ersten Semester (zu Abschntt 3. b., Seite 6 des Leitfadens) • Ad (c) Portfolio • Ad (d) WLI-Fragebogen • Wie lerne ich? • Notizen machen • Systematisches Aufgabenlösen • ALPEN-Methode • Checkliste für erfolgreiche Gruppen • Von der Stoffmappe zur Lesemappe Material / Anregungen zu (Gruppen-)Treffen im zweiten Semester (zu Abschnitt 3. c., Seite 6 des Leitfadens) • Links • Abschlussbrief Material / Anregungen zur Gestaltung von (ergänzenden) Einzelgesprächen (zu Abschnitt 3. d., Seite 7 des Leitfadens): • Auszug aus S. Bachmair u. a. (Hrsg.): Beraten will gelernt sein Material / Anregungen zu Auswertung und Qualitätsentwicklung (Abschnitt 4, Seite 7) • Personalbogen zum Mentorenprogramm • Zielvereinbarung • Evaluation des Mentorenprogramms / Kurzauswertung • Evaluation des Mentorenprogramms / ausführlichere Auswertung
Dieser Mentorenleitfaden stellt den Mentoren/-innen der Fachhochschule Aachen Anregungen und Materialien zur konkreten Gestaltung des seit 2006 in der Rahmenprüfungsordnung der Hochschule verankerten Mentorenprogramms zur Verfügung. Er ist dem Charakter dieser Hochschule entsprechend vornehmlich auf natur- und ingenieurwissenschaftliche Studiengänge ausgerichtet, verweist aber auch auf über diese Bereiche hinausgehende Materialien.
Calibration of a Network Analyzer Without a Thru Connection for Nonlinear and Multiport Measurements
(2008)